Hi,
You may find the below resources helpful in getting you started with a flexible width site in Muse similar to the example you provided.
http://tv.adobe.com/watch/muse-feature-tour/muse-design-for-flexible-browser-width
https://helpx.adobe.com/muse/how-to/add-100-width-slideshow.html
http://helpx.adobe.com/muse/using/using-fill-browser-fill-options.html
http://tv.adobe.com/watch/learn-adobe-muse-cc/adding-scroll-effects/
http://helpx.adobe.com/muse/using/scroll-effects-opacity-slideshow-animate.html
Cheers,
Vikas